Whether should I take a studies drop or not?

look boss...... its good that your thinking to repeat class 12 and things on again..............its good but look you have to waste a couple of years again to start all over......but if you have the will and determination to do well in your next attempt then go for it....................... and regarding you applying as a private candidate consult any of the cbse schools in your area.............. i am sure they will surely help you....god bless